Performs first year warranty preventive maintenance service calls on HVAC equipment to prevent equipment failure by cleaning air handling systems and reheat coils, monitoring and calibrating air handling systems and replacing filters, motors, fans, belts, etc. Performs repairs of complete systems to include repairing, calibrating or replacing controls, switches, thermostats, transformers, gauges, wiring fans, pumps, compressors, condensers, piping and other functional components of the system.